Ok, it is just a tp, but did not find it the best tool to write a little game (as i am doing) simply because it is just too complex (consider that there is no QGraphicsWidget to avoid using model/view).
So since i am writing a simple chess interface with a friend of mine, i wrote a very simple but quite versatile canvas that should be really easy to use for simple game or similar simple apps. Since it has been very useful to me, it may also me useful to you:

http://kboard.sourceforge.net/wiki/index.php/Canvas

Here you will find the source and docs (yes, there are the docs :) ), should it be of help to you let me know :)